this post was submitted on 18 Nov 2024
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Climate - truthful information about climate, related activism and politics.

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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

Recommended actions to cut greenhouse gas emissions in the near future:

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[–] Aksamit 7 points 2 weeks ago* (last edited 2 weeks ago)

By 2030 we are going to be 40% over capacity on fresh water resources globally.

This massive drought is likely to kill a few billion people around the world before the massive global famine will get the rest of us.

40% of arable land has already been depleted and 95% will be by 2050.

And this is just water and food.

Once arctic ice sheet coverage gets below 1,000,000 square kilometres, the planet will be absorbing more heat than it reflects. This is called a Blue Ocean Event and this will trigger the Clathrate Gun Hypothesis

2024 Arctic sea ice likely reached its annual minimum extent of 4.28 million square kilometers.

Greenhouse gas emissions are still increasing and Fuelled by climate change, the world's oceans have broken temperature records every single day over the past year.

So it's basically a race between if the drought and famine will kill us all first, or the BOE setting off the Clathrate Gun will. Either way, it is unlikely the human race survives the century.

(Edited to trim that weird BOE link that didn't format fully and to combine that dought/famine sentence so it parsed better.)